from flask import abort
from flask import current_app, jsonify
from flask import g
from flask import request
from flask import session

from info import db
from info.models import News, User, Comment, CommentLike
from info.utils.commons import user_login_data
from info.utils.response_code import RET
from . import news_blue
from flask import render_template

@news_blue.route('/followed_user', methods=['POST'])
@user_login_data
def followed_user():
    if not g.user:
        return jsonify(errno=RET.NODATA,errmsg = "该用户未登录")
    author_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([author_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg = "参数不全")

    if not action in ["follow","unfollow"]:
        return jsonify(errno=RET.DATAERR,errmsg = "操作类型有误")
    try:
        author = User.query.get(author_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg = "获取用户失败")
    if not author: return  jsonify(errno=RET.NODATA,errmsg = "该作者不存在")
    try:
        if action == "follow":
            if not g.user in author.followers:
                author.followers.append(g.user)

        else:
            if g.user in author.followers:
                author.followers.remove(g.user)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg = "操作失败")
    return jsonify(errno=RET.OK,errmsg = "操作成功")






@news_blue.route('/comment_like', methods=['POST'])
@user_login_data
def comment_like():
    if not g.user:
        return jsonify(errno=RET.NODATA,errmsg = "用户未登录")
    comment_id = request.json.get("comment_id")
    action = request.json.get("action")

    if not all([comment_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg = "参数不全")
    if not action in ["add","remove"]:
        return jsonify(errno=RET.DATAERR,errmsg = "操作类型有误")
    try:
        comment =Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg = "获取评论失败")
    if not comment: return jsonify(errno=RET.NODATA,errmsg = "评论不存在")
    try:
        if action=="add":
            comment_like = CommentLike.query.filter(CommentLike.user_id==g.user.id,CommentLike.comment_id==comment_id).first()
            if not comment_like:
                comment_like = CommentLike()
                comment_like.comment_id = comment_id
                comment_like.user_id = g.user.id
                db.session.add(comment_like)
                comment.like_count +=1
                db.session.commit()

        else:
            comment_like = CommentLike.query.filter(CommentLike.user_id == g.user.id,
                                                    CommentLike.comment_id == comment_id).first()
            if comment_like:
                db.session.delete(comment_like)

                if comment.like_count>0:
                    comment.like_count -= 1
                db.session.commit()

    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR,errmsg = "点赞失败")

    return jsonify(errno=RET.OK,errmsg = "操作成功")




@news_blue.route('/news_comment', methods=['POST'])
@user_login_data
def news_comment():
    if not g.user:
        return jsonify(errno=RET.NODATA, errmsg="用户未登录")
    news_id = request.json.get("news_id")
    content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    if not all([news_id, content]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不全")
    comment = Comment()
    comment.user_id = g.user.id
    comment.news_id = news_id
    comment.content = content
    if parent_id:
        comment.parent_id = parent_id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="评论失败")
    return jsonify(errno=RET.OK, errmsg="评论成功", data=comment.to_dict())


@news_blue.route('/news_collect', methods=['POST'])
@user_login_data
def news_collect():
    # user_id = session.get("user_id")
    #
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    if not g.user:
        return jsonify(errno=RET.NODATA, errmsg="该用户未登录")

    if not g.user:
        return jsonify(errno=RET.NODATA, errmsg="用户未登录")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不全")
    if not action in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.DATAERR, errmsg="操作类型有误")
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="新闻获取失败")
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="新闻不存在")
    try:
        if action == "collect":
            if not news in g.user.collection_news:
                g.user.collection_news.append(news)
        else:
            if news in g.user.collection_news:
                g.user.collection_news.remove(news)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="操作失败")

    return jsonify(errno=RET.OK, errmsg="操作失败")


@news_blue.route("/<int:news_id>")
@user_login_data

def news_detail(news_id):



    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="获取新闻失败")

    if not news:
        abort(404)

    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(5).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="新闻查询失败")
    click_news_list = []
    for new in news_list:
        click_news_list.append(new.to_dict())

    is_collected = False
    if g.user and news in g.user.collection_news:
        is_collected = True

    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="获取评论失败")
    like_comment_ids = []
    if g.user:
        try:
            comment_likes = CommentLike.query.filter(CommentLike.user_id==g.user.id).all()
        except Exception as e:
            current_app.logger.error(e)


        for comment_like in comment_likes:
            like_comment_ids.append(comment_like.comment_id)
    comment_list = []
    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict["is_like"] = False
        if g.user and comment.id in like_comment_ids:
            comment_dict["is_like"] = True
        comment_list.append(comment_dict)


    is_followed = False
    if g.user and news.user:
        if g.user in news.user.followers:
            is_followed= True

    data = {
        "news_info": news.to_dict(),
        "user_info": g.user.to_dict() if g.user else "",
        "click_news_list": click_news_list,
        "is_collected": is_collected,
        "comments": comment_list,
        "is_followed" : is_followed
    }
    return render_template("news/detail.html", data=data)



